Belt tightening and tracking device



Sept. 14, 1948. D. E. SUTTON 'BEL'I' TIGHTENING AND TRACKING DEVICE Filed April 8, 1946 llwliuisllll,

' INVENTOR. Java d f. (fa/f0 a MM ATTORNEY Patented Sept. 14, 1948 2,449,519 I ear/r TIGHTENING AND rmcmeinmcsgg Donald E. Sutton, Kalamazoo; 'Mich., assignor to Hammond Machinery Builders; Inc., Kalamazoo, Mich, a corporation of Michigan Application April 8, 1946, Serial No. 660,351 I This invention relates to improvements in belt tightening and tracking device.

The main objects of this invention are:

First, to provide a belt tightening and tracking device for belt grinding machines and the like which provides very efiicient support for the belt and quick and accurate adjustment therefor.

Second, to provide a structure having these advantages which is compact and simple.

2 Claims. (01. 51-448) I with a head l5 having swiveling engagement with the shoulder bore [6 so that by rotating the screw through its hand piece It the member 8 is tiltingly adjusted on its pivot 9 and supported in. its adjusted position.

The chambered bracket ll is plvotally or swingably mounted on the outer end of the support 8, the bracket having a hub portion l8 engaging the cylindrical portion l9 of the support.

Objects relating to details and economies of the 10 he Sp 0 is Secured in the 0111761 Swinginvention will appear from the description to foling end of the bracket by means of the set screws low. The invention is defined and pointed out in 25]. At its outer end the member 8 is provided the claims. with an arm 2| having a laterally turned portion A structure which embodies the features of the disposed below the bracket H to thrustingly supinvention is illustrated in the accompanying port the tensioning or belt-tightening screw 22. drawing, in which: This screw is arranged through the opening 23 Fig. 1 is a front elevation of a belt grinding in the top of the bracket l1 and is provided with machine embodying my invention, certain parts a hand piece 24 at its outer end. The screw is being shown conventionally. provided with a thrust abutment 25 for the spring Fig.2is an enlarged fragmentary view partially 26, the upper end of the spring engaging the in section on line 2-2 of Figs. 3 and 4. bracket. The thrust abutment is threaded on Fig. 3 is a view mainly in section on line 3--3 the screw so that the tension of the spring may of Figs. 1 and 4. be varied.

Fig. 4 is a fragmentary elevational view look- With this arrangement of parts, the pulley 6 ing from the left of Figs. 1, 2, and 3. 25 is supported so that it may be quickly and easily It will be understood that I am employing the adjusted for securing proper tracking of the belt word grinding in its broad sense to include and alsotensioning 0f the belt in its various adpolishing, deburring, beveling, descaling and justed positions. similar operations on metals, plastics, ceramics, The work supporting table is conventionally glass and the like. shown at 21.

In the accompanying drawing i represents the I have not attempted to illustrate or describe base of the machine which is provided with a drip various modifications and adaptations of my inpan 2, and motor 3 mounted below the drip pan. vention which might be desirable for particular These parts are shown conventionally. The drivuses as it is believed that this disclosure will ing gear is housed Within the base and as it forms enable thoseskillcd in the art to adapt or embody no part of this invention, it is not illustrated. my invention as may be desired.

The pedestal or belt support t is mounted on Having thus described my invention, what I the base i, it being shown in upright position in claim as new and desire to secure by Letters Patthe drawing although for certain work it is disent is: posed in horizontal position. The grinding belt 1. In a belt tightening and tracking device, the 5 is supported by a lower driven pulley not illuscombination with a pedestal provided with a trated, housed in the bottom of the pedestal, and housing having a downwardly opening pulley the upper pulley 6 arranged in a pulley chamber chamber therein and an auxiliary chamber dis- 1 provided in the upper end of the pedestal. This posed at the side of the pulley chamber, a pulley pulley 6 is supported for belt tensioning adjustarranged in said pulley chamber, a spindle for ment and also belt tracking adjustment. said pulley projecting from said pulley chamber,

The spindle supporting bar 8 is mounted on the a spindle supporting bar disposed in said auxiliary pivot 9 disposed transversely of and in the plane chamber to project therefrom and in parallel of the spindle it of the pulley. This spindle suprelation to said spindle a pivot pin extending port 8 projects into the chamber H at the front through said bar disposed transversely of the of the chamber 1 to receive the supporting and spindle and in substantially the plane thereof and adjusting screw l2 which is threaded into the supported in the walls of said auxiliary chamber, supporting nut l3, carried by the pedestal, the an adjusting screw for said bar having rotating screw being provided with a hand piece It on its engagement with the inner end thereof, a nut outer end. On its inner end the screw is provided coacting with said screw carried by said housing,

4 et, a tensioning screw disposed through said bracket in supporting engagement with said arm and having a threaded abutment thereon, and a coiled spring arranged on said screw between said 5 abutment and bracket.

DONALD E. SUTTON.

REFERENCES CITED- The following references are of record in the 2. In a machine of the class described, the: 10, .me of thi patent;

combination with a pulley andspindle thereof o'f a spindle supporting membendispos'edin parallel relation to the spindle and provided. withravpivot disposed transversely of the-spindle, athreadedg adjusting means for said support member; a spindle supporting bracket rotatably mounted on said supporting member for axial tiltin'g adjustment therewith, an arm on the outer end oif said supporting member projecting below said brack- UNITED STATES PATENTS Number :Name Date 1,665,149 -Mattison Apr. 10, 1928 139165543 'Wel'ch July 4, 1933 2,254,346 Bazvzoni Sept. 2, 1941 2,367,107 Eimrnons Jan. 9, 1945 2;368;8,48 Krueger Feb. 6, 1945 

